Water

OEHHA performs major risk assessment and hazard evaluation activities relating to chemical contaminants in drinking water. These activities include developing health advisories, Public Health Goals for chemical substances in drinking water, Notification Levels, and providing toxicological assistance for chemical monitoring activities for the drinking water supply. The program also provides education to the public and other governmental agencies on drinking water contamination and drinking water regulatory standards development.

Public Health Goals

Level of a chemical contaminant in drinking water that does not pose a significant risk to health

Notices

Legal notices for Public Health Goals and Notification Levels

Notification Levels

Health-based advisory levels for chemicals in drinking water

Reports

Reports focusing on water

Human Right to Water

OEHHA’s assessment framework and data tool related to drinking water quality, accessibility, and affordability

Reports, Notices, Documents

OEHHA determined a proposed Notification Level of 120 ppb (ug/L) for methyl isobutyl ketone.

OEHHA announces a public workshop to discuss 12 draft technical support documents for Public Health Goals (PHGs) for chemicals in drinking water.  These chemicals are: aluminum, benzene, carbofuran, carbon tetrachloride, dichloromethane, diquat, nickel, simazine, tetrachloroethylene, thiobencarb, uranium, and vinyl chloride.

The following chemicals are undergoing evaluation for Public Health Goal development in 1999: aluminum, benzene, carbofuran, carbon tetrachloride, dichloromethane (DCM), diquat, nickel, perchlorate, simazine, tetrachoroethylene (PCE), thiobencarb, uranium and vinyl chloride.

OEHHA conducted an expedited human health risk assessment of tertiary butyl alcohol in drinking water.  An interim assessment concentration of 12 µg/L was determined.

OEHHA determined that a proposed action level of 0.005 ug/L for 1,2,3-trichloropropane in drinking water is appropriate.